Duplicating machine



March 5, 1935. AQ MARcHEv ET Al.

DUPLICATING MACHINE- Filed oct. 7, 1935 5 sheets-sheet 1 A m 4M yfffo rvr 651.5,-

March 5, 1935. A. MARcHEv ET AL 1,993,558

DUPLCATING MACHINE Filed Oct. 7, 1933 5 Sheets-Sheet 2 Marc'h 5, 1935. A. MARcHEv Er AL DUPLICATING MACHINE Filed 001;. 7, 1953 3 Sheets-Sheet 3 fijs 2 Patented Mar. 5, 1935 UNITED STATES ATENT OFFICE DUPLICATING MACHINE Alfred Marchev andk John W. Hernlund, La.

Grange, Ill., assignors to Ditto, Incorporated, Chicago, Ill., va corporation of vWest Virginia Application October 7, 1933, Serial No. 692,679

claims. (Greiz-'14) This invention relates to improvementsk in fastened to the spindle by means of a fastening duplicating machines and, more especially, to clip attached to it. For convenience, however, the gelatin band-carrying spindles thereof and vthe backing material, being a part of the enthe fastening clips adapted for attaching the tire gelatin band, may commonly be referred to 5 end of said band to the spindle. as the band itself. Therefore, in speaking of a 5 Among the features of our invention is an imclip attached to the end of the gelatin band or proved construction permitting easy attachto the end of the band, or in speaking of the ment of the end of the Vband tothe spindle and attachment 0f the end 0f the gelatin bend, 01 so made that when the bandV is yunvvound from the band,v to the spindle, it is to be understood l0 the spindle and the'end reached, said band will that this may refer only to the backing mal0 detach itself from the spindle, thus lessening terial itself forming a part of the band. In or eliminating danger of tearing or breaking other words, in speaking of the band, or gelatin of the band. band, hereinafter, it is to be understood that Y Another feature of our invention is a spindle this may mean only the backing material of with improved means for rotatably supporting the band upon which the gelatin coating is l5V the same in the machine. carried.

Other features and advantages of our inven- Itis to be understood, also, that the spindles tion will appearv more fully as we proceed with shown herein and the band carried thereby are our specification.` adapted for use upon hectograph duplicating In those forms of devices embodying the feamachines of a conventional type which are now 20 tures of our invention shown in the accompanyin common use; and that, therefore, itis not ing drawingsv i necessary to show all the details of such ma- Figure 1 is a vertical sectional view through chines in order to disclose this invention.

i the spindle showing the end of ra gelatin band As shown in the drawings, 20V indicates a attached; Fig. 2 is a similar view in top plan; spindle, here shown inthe form of a cylinder, 25 Fig. 3 is a view taken as indicated by the line made of sheet metal having its edges fastened 3 of Fig. 2; Fig. 4 isa view taken as indicated by the longitudinal crimped Aseam 21. by the line 4 of Fig.` 2, on an enlarged scale; 22 indicates the gelatin band adapted to be Fig. 5 is a View similar to Fig. 4 showing the carried by the spindle 20 and wound onto and band detaching itself from the spindle; Fig. 6 off of the same in the operation of a duplicating 30 is a. view similar to Fig. 2 showing a modified machine. In the use of such a machine, it is form; Fig. 7 is arview takenias indicated by the Customary to wind the band back and forth line '7 of Fig. 6; Fig. S is a vertical sectional from one spindle to another. In doing this it vieviT through the endiof the spindle; Fig. 9 is is necessary to attach one end of the band to a view taken as indicated by the line 9 of Fig. the receiving spindle at the commencement of 3'5"` 8; Fig. 10 is a view taken as indicated by the one winding operation. When this receiving line 10 of Fig. 6; and Fig. 1 1 is a view similar spindle is full, the operation of the machine is to Fig. 6, showing a lmodification in the end reversed and the band is wound off of said spinof the spindle. i .Y dle. During this operation, when the end of the Itis to be understood that the gelatin band, band is reached, it is necessary or desirable that 40 which maybe referred to as the band, is of the the same detach itself automatically from the kind commonly used upon vduplicating maspindle in order to prevent breakage or tearing. chines of the hectographrtype in which there To this end we have provided an attaching is employed` a long strip or band of material means or fastening clip for the end of the band having thereon a gelatin coating. This strip which can be easily and quickly attached to a 45 with the coating thereon in its entirety may be spindle and which is self-detaching when the referred to as thegelatin band or as the, band. band is unwound from such spindle. It is obvi- The gelatin, coating itself ordinarily` does not ous that one or both ends of the band can be have enough strength to be` used alone and, provided with such attaching means and, conconsequently, it must be provided with some sequently, we have here shown but one end. 50 sort of backing in the nature of a flexible strip The spindle V20 Vis provided with an elongated or band of material which has more strength fiattened face 23 which is here shown as centhan the gelatin and to which the gelatin will trally arranged and extending a distance equal adhere. Consequently, in common practice, only to about one-half the length of the entire spinthe end of this strip of backing material is dle. This flattened face 23 is provided with 55' a centrally arranged slot 24. For convenience in manufacture, the flattened face 23 is formed adjacent the seam 2l, as shown in Fig. 5. As here shown, the face 23 is wide enough to form a chord subtending an arc of about 50 of the circumference of the spindle 2o.

The end of the band 22 is provided with a. fastening clip or anchor serving as an attachment te the spindle, the clip being described in our co-pendingapplication, Serial No. 692,680 filed October 7, 1933. This fastening clip is made out of a single piece of flat sheet metal and the-V clip in its entirety is indicated by 3,0. The clip includes primarily a convexed portion 31" and a tongue 32 adapted to be 'inserted inthe slot 24. Means are provided for attaching saidV clip to the end of the band 22. Theclip shown in Figs. 4 and 5 is made out of one piece of sheet metal and, as there shown, the tongue 32 is of double thickness and attached to one edge of the portion 31 by the portion 33. The two thicknesses of the tongue 32 are indicated by 34 and 35, the latter joining the portion 33'. The other thickness 34 is extended inwardly between the portions 31 and 33, as indicated by 36. The end of the band 22 is preferably attached to the clip by passing it under the portion 31, thence around the treey edge of the portion 36 and thence down into the double tongue 32 between the walls 34 and 35.v In Fig. f1, the extreme end of the band 22 is indicated by 22a. The tongue 32 is slanted somewhat with respect to the member 31 in the direction that the band extends so that a tangential pull on the band, as shown in Fig. 4, will cause the tongue 32' of the clip to hook in the slot 24. When the band is completelyv unwound, however, and the pull becomes somewhat Iriore than tangential, as shown in Fig. 5, this pull readily engages the tongue from the slot, thusvcausing self-detachment of the band from 'the spindle.

It will be noted that the tongue 32 is substantially straight as distinguished from th usual. hook provided for this purpose.

In Figs. 6, 7 and 11 we have shown aA somewhat different form of fastening clip and spindle construction. AsI here shown, the band is indicated by 122-and the clipA in its entirety isA indicated by 130. Here, again, the clipY is. formed of a single piece of sheet metal and includes the convex portion 131 and slanting tongue 132. The outer edge of the tongue is also joined to one edge ofv the portion 1.31 by the portion 133. Here the tongue also is shown double, but there is no portion extended between the portions 131 and 133. The end of the band 122 is indicated by 1228' and the sameisattached to the clip by clamping the same between the portions 131 and 1,33 of the clip.

In the form of Figs. 6 and 7 the spindleis indicated by and the same is provided. with a flattened face 123, but instead of having an open slot such as 24, the face 123 is here provided with adepression or trough 124, the walls of which 1211a diverge inwardly.. Attachment of the band is eiected byinserting the tongue 132 ofthe clip in the, trough and this tongueV being slanted, engages. one of the walls 124ia of the trough. Detachment is eiected in the same manner as indicated in Fig. That is7 as soon as the pull on the band is somewhat outwardly or, away from'the spindle, this serves to p ull the tongue 132 out of the trough and disengage the clip. from the spindle.

The spindleof Figs. 1 and 2..is provided with cap members 50 on the ends, the outer faces of said cap members being provided with circular concavities 51 each having a diametrically arranged slot 52a therein. These end members facilitate mounting of the spindle in a machine and are adapted to cooperate with the supporting and driving parts of a machine shown in Fig. l. As here shown, 52 and 53 indicate bearing or socket members for rotatably supporting the cap members 50. 54 indicates a springpressed plunger seated in the concavity 51. In Fig. 1, 55 indicates a driving member provided on its end with a blade 55 adapted to enter the slot 52a for the purpose of rotating the spindle.

In the spindle of Figs.V 6, 7, 8, 9 and 10 the same is provided with cap members 15G on the ends, each of said cap members carrying a pintle 151 having a ilattened portion 152. The cap member is provided with a slot in which the inner end of the member 152 is inserted, the attachment being effected by clamping, welding, soldering or other suitable means. Certain por*- tionsV of a machine for supporting this. spindle are shown in Fig. 6. As here shown, one. side of the machine carries a bearing block 157 adapted to receive the pintle 151`and permit free rotation of the latter therein. 158 indicates a driving member for the spindle and this is provided with a socket to receivevthe. pintle 151. This member 158 is extended and provided with parallel jaws 160 to` engage the iiattened member 152 to eiect rotation of the spindle. f

While we have shown and described. certain embodiments of our invention, it is to be understood that it is capable. ofv many modifications. Changes, therefore, in the construction and arrangement may be made'l without departing. from the spirit and scope of the invention as disclosed in the appended claims, in which it is our intention to claim` all novelty inherent in our invention as broadly as permissible, in View of the prior art.

What we regard as new, and desire to secure by Letters Patent, is:

1. In a duplicating machine, a spindle having a flattened face with a slot therein, a gelatin band and a fastening. clip formed of a single piece of sheet metal and attachedtoone end ofsaid band, said clip having a portion adapted to lieon said flattened face and provided with a tongue to enter said slot, the outer edge of the tongue being joined by a portion of metal to one edge of theportion of the clip adapted to lie on the iattened face of the spindle, the end of the bandfbeing clampedbetween said portions of said clip.

2. In av duplicating machinaa spindle having a flattened face with a slot therein, a gelatin band and a fastening clip attached to one end of saidband, said clip having a portion adapted to lie on said. flattened face and provided with a tongue adapted to enter said slot, said tongue being formed of two layers of material with the end of the band clamped therebetween.

3..'I'he combination with a spindle having a flattened face with a slot therein, of a flexible band, and a fastening clip attached to one end of said band, and adapted to lie on said flattened iace within the boundaries thereof, said clip having a tongue adapted to enter said slot.

4. The combination with a spindle having a flattened face with a slot therein, of a flexible band, and a fastening clip attached to one end of .said band andadapted to lie on said flattened face. within the boundaries thereof, said clip having a tongue adapted to enter said slot and face Within the boundaries thereof, said clip being said tongue being clamped to said end of said formed of a single piece of sheet metal clamped band. to said end of said band and formed into a tongue 5. The combination with a spindle having a adapted to enter said slot.

flattened face with a slot therein, of a flexible band, and a fastening clip attached to one end of ALFRED MARCHEV.

said band and adapted to lie on said attened JOHN W. HERNLUND. 

